Emails not coming to distribution list group

I am having an issue where emails are not being sent to memebers of distribution group. I created a distribution group enabled email box and added myself as a member and see it in the distribution group list. But the emails are not reaching the user. If I add the email directly to the user it works. I also checked our email spam system and see the emails are getting through and being sent to the exchange server.

1.) Can you see the DG in the GAL?
2.) if you email the DG internally selecting it from the GAL do the members of the DL receive the mail?
3.) if you internally email the DG's SMTP address does it work?
4.) if you externally email the DG's SMTP address does it work?

For using it externally(different domain that yours) you need to make sure the flag for "Require that all senders are authenticated" is not checked off. External addresses are not authenticated users. It's in the exchange console, properties of your DG, Mail Flow Settings tab and under Message Delivery Restrictionsscreenshot.jpg

This process describes the steps required to Import and Export data from and to .pst files using Exchange 2010. We can use these steps to export data from a user to a .pst file, import data back to the same or a different user, or even import data t…

In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment.
The video tutorial explains the basics of the Exchange server Database Availability grou…